Cal. Welf. & Inst. Code § 16990.9

The level of financial maintenance of effort required of a county that contracts with the department pursuant to Section 101300 of the Health and Safety Code during the 1991–92, 1992–93, 1993–94, 1994–95, and subsequent fiscal years may be reduced by the amount of local public health service funds retained by the county for that fiscal year that are unexpended as a result of vacant contracted positions.